CAJ | 학술논문

电液伺服阀的工作介质抗燃油的变化是影响伺服阀工作的重要环节。根据某电站电液伺服阀在更换抗燃油后出现阀芯卡死现象，采用异物分析、质量缺失分析、混油试验分析等多源查找方法，分析伺服阀卡死故障的机制与影响原因。综合分析结果表明：伺服阀卡死故障主要是由于抗燃油液压系统换油后生成的油泥阻塞了阀体内阀芯部件的微小运动间隙，增大了摩擦阻力，引发卡死。而油泥主要来源是金属颗粒、抗燃油劣化组份、橡胶管道溶解产物以及外来污染产物如硅藻土和吸附剂等。
전액사복벌적공작개질항연유적변화시영향사복벌공작적중요배절。근거모전참전액사복벌재경환항연유후출현벌심잡사현상，채용이물분석、질량결실분석、혼유시험분석등다원사조방법，분석사복벌잡사고장적궤제여영향원인。종합분석결과표명：사복벌잡사고장주요시유우항연유액압계통환유후생성적유니조새료벌체내벌심부건적미소운동간극，증대료마찰조력，인발잡사。이유니주요래원시금속과립、항연유열화조빈、상효관도용해산물이급외래오염산물여규조토화흡부제등。
The property changes of the working medium of fire-resistant oil will affect the operating property of the elec-tro-hydraulic servo valve.According to the phenomenon of the valve core jammed after replacing the fire-resistant oil in a power station,the foreign matter analysis,mass loss analysis,mix oil test analysis and so on multi-source searching meth-od were used to analyze the mechanism and effect causes of the servo valve jammed failure.Comprehensive analysis of the test results show that the servo valve jammed failure is mainly due to the oil sludge generated from the oil change of the hy-draulic system,which blocks the slight gap between the valve corn and the valve body valve,increases friction and causes jam.The main source of sludge is metal particles,the degradation components of fire-resistant oil,the dissolved products of rubber pipes and foreign pollution products such as diatomaceous earth and adsorbent and so on.